On my '91 CQ, the cooling fan fuses are # 5 (30amps - full speed), #15 (25amps - wiper, rad fan, turn signal, washer nozzle heater) and #20 (30 amps 1st speed). With AC off, the rad fan only turns on when I remove the 25 amp fuse. With AC on the fan stays on. Any thoughts? Thanks.